The document discusses various Microsoft technologies for working with data including: - Entity Framework which provides an object-relational mapper (ORM) for ADO.NET and allows mapping entities and database tables. - ADO.NET Data Services which exposes data and methods through RESTful web services using OData protocols and supports various data sources. - Differences between LINQ to SQL and LINQ to Entities where the latter supports more capabilities but both allow querying data with LINQ.